Magnetic ore-separator.



PATBNTI'ID 00T. 9, 1906.

B?. H; WAIT.

MAGNETIC ORB SEPARATR.

APPLIUATION FILED-MAR. 2o, 1905.

oww/Smal@ 1UNIFIED STATES 'PATENT FFIGE.

HENRY H. WAIT, F CHICAGO, ILLINOIS, ASSIGNOR IO INTERNA'IIONL SEPARA'IORCOMPANY, QF CHICAGO, LL'INOIS, ACORPORATION OF new massif.

MAGNET@ ose-saneaninron.

Specification of Letterslatent Patented. oct. e, loco.

have invented a certain new and useful Inl-g 1 rovement in IIa netic Ore-*Se arators of" which the following is a inll, clear, concise,

larlyb ings, i ustrating the preferred embodiment and exact description.

My invention relates to' a magnetic sepa` rator; and its object is to provide an iinproved simple machine which Will make a clean magnetic concentrate.

In some kinds of ore there are small particles of highlyfmagnetic material attached to or embedded in other'jless permeable material. The ordinary form oi" ore-separator having a revolvirrg separating-carrier With magnetic teeth or projections at its surface is not entirely eiiejbtive to produce a clean magnetic concentrate from the cre above mentioned because thehighly-magnetic pon tions can become attachedldirectly to the teeth orprojections, and a large amount of non-magnetic material can thus be carried over into the magnetic product.

In accordance with the present invention an armature or magnetic cylinder provided with teeth or permeable projections at its pe riphery is arranged to rotate in the field of a magnet. The armature is surrounded by a shield or drum of nonmaglnetic material, and the material to be separated fed into conJ tact with said non-magnetic slneld and through the space between aaidshield and one of the magnet-poles. The shield can be arranged to turn with the armature'or may be independent thereof. The shieldA serves to hold the material'being treated away from -direct contact with the magnetic projections on the armature, so that small magnetic particles attached to larger bodies ofnon-mag netic material will not be attracted to the drum strongly enough to carry suchlarger bodies over into the magnetic product.

I will describe my invention more particureference to the accompanying drawth'ereof, and the arts, improvements, or

f 4combinations whc I regard as novel will be 5o pointed out in the appended claims.

Figure l isalongitudinal sectional eleva tionor` the magnetic separator. Fig. 2 is a transversesectional view thereof on line 2 2 of Fig- 1. "Figg`3 is an enlarged detail view somewhat diagrammatic in its character, illustrating the construction of the parts on eitherside of the Working gap where separation takes place:

same partsw'herever they are shown.

The machine illustrated comprises in its eleof opposite polarity,l an armature C, having magnetic teeth or projections at its periphery, arranged to rotate between said polepieces, and moans for passing material to be separated between said armature and one of said pole-pieces. ery of the armature may be of any suitable form adapted to producen concentration of the magnetic 'linx at lines, points, or narrow areas, so that magnetic particles will be drawn along converging lines of force toward tionary pole-piece The armature should be laminated to allow it to turn in the intense magnetic'cld Without excessive eddy-currents and Without requiringl an undue expenditure of mechanical energy, and the magret-poles are preferably located on opposite sides of the armature, so as to balance, so far as practicable, the magnetic pull.

In accordance with my invention the ar E, ci non-magnetic material, such as vulcanized fiber or highaesistance metal, which is comparatively thin and tits closely around the armature. The spaces between the teeth D of the armature are preferably -filled with non-magnetic material, such as wax, to give the armature a smooth bearing-surface for the shield. Yreferably the shield is mounted to rotate relatively to the armature and may shield is shown mounted upon end' plates L L', which are journaled to rotate upon the armature-shaft. The end plate L carries a gear-Wheel H, and the armature-shaft carries a gear-Wheel'I. These Wheels H and I upon a common shaft, so thatthe armature in its rotation drives the drumE in the same direction through the medium of the 'gears I,

erably constructed with different ratios, so that the speed of the armature will be different from the speed of the surroundingnonmagnetic-drum. The pole-piece N is also The same letters of reference designate the' dnents a. magnct'having two pole-piecesN S mature C issurrounded by a shield or drum' be geared' thereto, as indicated in Fig. 2; ,i-g'..

mesh with pini'ons K K respectively, carried The projections at the periphf i the armature rather than toward the sta- IOO K', K, and Il. The gears, however, are prefpreferably provided with a nonmiagnetie Shield of greater thickness than the shield E of the armature, so that maglie tie vmateriali the working vgap will be subjected to the greatest attraction toward the surface of the -armature rather than toward the-stationary pole-piece. y

' It will be seen that the nonLmagnetic shield E holds small' particles of non-magnetie material out ci, direct contact with the toothed surface of the armature, so that the teeth do Anot exert as' strong a pull as they otherwise would.. JV ith a'small partiels the pull is very greatly lessened by a slight separation from the magnet-pole, While with a relatively larger particle the same distance of separation from the magnet-pole will notdecrease the pull -in the' same proportion. By my invention therefore the more purely mag' netic material only is saved, whilethe .mixed particles, containing mostly non-magnetic material, but having a small 'amount of permeable material attached thereto. will be re..

jected. lf theshield .is given a movement ot rotation relatively to the armature, as by the gearing described or by ether-suitable means, 4the smaller mixed particles, which may be held by the magnetic Constituent, Wil-l have been given a tendency to turn over'upon the drum and 'so to beremovcd trom elose proximity` to the points of the armature-teeth.

. Having thus deseri bed my invention, I Claim- -l. ln a magnetic separator, the con'ibination with an armature mounted to rotate 35 upon a horizontal axis, of a non-magnetic shield for said armature, said armature being rotatable relatively to said shield, a magnetpole facing said armature, a non-magnetic shield for said pole of greater thickness than said armature-shield, and means for passing material to be separated between said shields.

2. In a magnetic separator, the combination with an armature, of `a shield of nonma netic material inclosin said armature, sai armature being rotatab e relative to said shield, a magnet-pole facing said armature, a nommagnetic shield for said pole of greater thickness than said' armature-shield, and means for passinggmateria'l to be separated between said shields.

3. In a magnetic separator, the combination with a magnet having pole-pfieces of opposite polarity, of an armature mounted to rotate between said magnet-poles, a shield of non-magnetic material surrounding said armature, a non-magnetic shield for one of said pole-pieces, said'shield being of greater thickness than the armature-shield, and means for passing material to be separated between said shields.

ln witness whereof I hereunto subscribe my nar-ne this 13th day of March, A. l). 1905.

HENRY WAIT.

Witi-iesses IRVING MACDONALD, DE Vl/rr'r OTANNER. 

